Merge pull request #410 from p-mazhnik/pavel/web-format

feat(web): support formats and detectionTimeout arguments

@@ -5,7 +5,9 @@ import 'dart:ui' as ui;
 import 'package:flutter/services.dart';
 import 'package:flutter_web_plugins/flutter_web_plugins.dart';
 import 'package:mobile_scanner/mobile_scanner_web.dart';
+import 'package:mobile_scanner/src/barcode_utility.dart';
 import 'package:mobile_scanner/src/enums/camera_facing.dart';
+import 'package:mobile_scanner/src/objects/barcode.dart';
 
 /// This plugin is the web implementation of mobile_scanner.
 /// It only supports QR codes.
@@ -102,8 +104,23 @@ class MobileScannerWebPlugin {
       };
     }
     try {
+      List<BarcodeFormat>? formats;
+      if (arguments.containsKey('formats')) {
+        formats = (arguments['formats'] as List)
+            .cast<int>()
+            .map((e) => toFormat(e))
+            .toList();
+      }
+      final Duration? detectionTimeout;
+      if (arguments.containsKey('timeout')) {
+        detectionTimeout = Duration(milliseconds: arguments['timeout'] as int);
+      } else {
+        detectionTimeout = null;
+      }
       await barCodeReader.start(
         cameraFacing: cameraFacing,
+        formats: formats,
+        detectionTimeout: detectionTimeout,
       );
 
       _barCodeStreamSubscription =
@@ -114,6 +131,7 @@ class MobileScannerWebPlugin {
             'data': {
               'rawValue': code.rawValue,
               'rawBytes': code.rawBytes,
+              'format': code.format.rawValue,
             },
           });
         }

@@ -136,10 +136,10 @@ class MobileScannerController {
     } */
 
     if (formats != null) {
-      if (Platform.isAndroid) {
-        arguments['formats'] = formats!.map((e) => e.index).toList();
-      } else if (Platform.isIOS || Platform.isMacOS) {
+      if (kIsWeb || Platform.isIOS || Platform.isMacOS) {
         arguments['formats'] = formats!.map((e) => e.rawValue).toList();
+      } else if (Platform.isAndroid) {
+        arguments['formats'] = formats!.map((e) => e.index).toList();
       }
     }
     arguments['returnImage'] = true;
@@ -363,10 +363,12 @@ class MobileScannerController {
         _barcodesController.add(
           BarcodeCapture(
             barcodes: [
-              Barcode(
-                rawValue: barcode?['rawValue'] as String?,
-                rawBytes: barcode?['rawBytes'] as Uint8List?,
-              )
+              if (barcode != null)
+                Barcode(
+                  rawValue: barcode['rawValue'] as String?,
+                  rawBytes: barcode['rawBytes'] as Uint8List?,
+                  format: toFormat(barcode['format'] as int),
+                ),
             ],
           ),
         );

@@ -9,12 +9,11 @@ import 'package:mobile_scanner/src/web/media.dart';
 
 abstract class WebBarcodeReaderBase {
   /// Timer used to capture frames to be analyzed
-  final Duration frameInterval;
+  Duration frameInterval = const Duration(milliseconds: 200);
   final html.DivElement videoContainer;
 
-  const WebBarcodeReaderBase({
+  WebBarcodeReaderBase({
     required this.videoContainer,
-    this.frameInterval = const Duration(milliseconds: 200),
   });
 
   bool get isStarted;
@@ -25,6 +24,8 @@ abstract class WebBarcodeReaderBase {
   /// Starts streaming video
   Future<void> start({
     required CameraFacing cameraFacing,
+    List<BarcodeFormat>? formats,
+    Duration? detectionTimeout,
   });
 
   /// Starts scanning QR codes or barcodes
@@ -158,3 +159,14 @@ class ImageCapture {
 extension ImageCaptureExt on ImageCapture {
   external Promise<PhotoCapabilities> getPhotoCapabilities();
 }
+
+@JS('Map')
+@staticInterop
+class JsMap {
+  external factory JsMap();
+}
+
+extension JsMapExt on JsMap {
+  external void set(dynamic key, dynamic value);
+  external dynamic get(dynamic key);
+}

@@ -35,9 +35,15 @@ class JsQrCodeReader extends WebBarcodeReaderBase
   @override
   Future<void> start({
     required CameraFacing cameraFacing,
+    List<BarcodeFormat>? formats,
+    Duration? detectionTimeout,
   }) async {
     videoContainer.children = [video];
 
+    if (detectionTimeout != null) {
+      frameInterval = detectionTimeout;
+    }
+
     final stream = await initMediaStream(cameraFacing);
 
     prepareVideoElement(video);

@@ -43,12 +43,14 @@ extension ResultExt on Result {
   /// https://github.com/zxing-js/library/blob/1e9ccb3b6b28d75b9eef866dba196d8937eb4449/src/core/BarcodeFormat.ts#L28
   BarcodeFormat get barcodeFormat {
     switch (format) {
-      case 1:
+      case 0:
         return BarcodeFormat.aztec;
-      case 2:
+      case 1:
         return BarcodeFormat.codebar;
-      case 3:
+      case 2:
         return BarcodeFormat.code39;
+      case 3:
+        return BarcodeFormat.code93;
       case 4:
         return BarcodeFormat.code128;
       case 5:
@@ -79,6 +81,42 @@ extension ResultExt on Result {
   }
 }
 
+extension ZXingBarcodeFormat on BarcodeFormat {
+  int get zxingBarcodeFormat {
+    switch (this) {
+      case BarcodeFormat.aztec:
+        return 0;
+      case BarcodeFormat.codebar:
+        return 1;
+      case BarcodeFormat.code39:
+        return 2;
+      case BarcodeFormat.code93:
+        return 3;
+      case BarcodeFormat.code128:
+        return 4;
+      case BarcodeFormat.dataMatrix:
+        return 5;
+      case BarcodeFormat.ean8:
+        return 6;
+      case BarcodeFormat.ean13:
+        return 7;
+      case BarcodeFormat.itf:
+        return 8;
+      case BarcodeFormat.pdf417:
+        return 10;
+      case BarcodeFormat.qrCode:
+        return 11;
+      case BarcodeFormat.upcA:
+        return 14;
+      case BarcodeFormat.upcE:
+        return 15;
+      case BarcodeFormat.unknown:
+      case BarcodeFormat.all:
+        return -1;
+    }
+  }
+}
+
 typedef BarcodeDetectionCallback = void Function(
   Result? result,
   dynamic error,
@@ -136,11 +174,7 @@ extension JsZXingBrowserMultiFormatReaderExt
 /// <script type="text/javascript" src="https://unpkg.com/@zxing/library@0.19.1"></script>
 class ZXingBarcodeReader extends WebBarcodeReaderBase
     with InternalStreamCreation, InternalTorchDetection {
-  late final JsZXingBrowserMultiFormatReader _reader =
-      JsZXingBrowserMultiFormatReader(
-    null,
-    frameInterval.inMilliseconds,
-  );
+  JsZXingBrowserMultiFormatReader? _reader;
 
   ZXingBarcodeReader({required super.videoContainer});
 
@@ -150,7 +184,27 @@ class ZXingBarcodeReader extends WebBarcodeReaderBase
   @override
   Future<void> start({
     required CameraFacing cameraFacing,
+    List<BarcodeFormat>? formats,
+    Duration? detectionTimeout,
   }) async {
+    final JsMap? hints;
+    if (formats != null && !formats.contains(BarcodeFormat.all)) {
+      hints = JsMap();
+      final zxingFormats =
+          formats.map((e) => e.zxingBarcodeFormat).where((e) => e > 0).toList();
+      // set hint DecodeHintType.POSSIBLE_FORMATS
+      // https://github.com/zxing-js/library/blob/1e9ccb3b6b28d75b9eef866dba196d8937eb4449/src/core/DecodeHintType.ts#L28
+      hints.set(2, zxingFormats);
+    } else {
+      hints = null;
+    }
+    if (detectionTimeout != null) {
+      frameInterval = detectionTimeout;
+    }
+    _reader = JsZXingBrowserMultiFormatReader(
+      hints,
+      frameInterval.inMilliseconds,
+    );
     videoContainer.children = [video];
 
     final stream = await initMediaStream(cameraFacing);
@@ -163,7 +217,7 @@ class ZXingBarcodeReader extends WebBarcodeReaderBase
 
   @override
   void prepareVideoElement(VideoElement videoSource) {
-    _reader.prepareVideoElement(videoSource);
+    _reader?.prepareVideoElement(videoSource);
   }
 
   @override
@@ -171,9 +225,9 @@ class ZXingBarcodeReader extends WebBarcodeReaderBase
     MediaStream stream,
     VideoElement videoSource,
   ) async {
-    _reader.addVideoSource(videoSource, stream);
-    _reader.videoElement = videoSource;
-    _reader.stream = stream;
+    _reader?.addVideoSource(videoSource, stream);
+    _reader?.videoElement = videoSource;
+    _reader?.stream = stream;
     localMediaStream = stream;
     await videoSource.play();
   }
@@ -182,7 +236,7 @@ class ZXingBarcodeReader extends WebBarcodeReaderBase
   Stream<Barcode?> detectBarcodeContinuously() {
     final controller = StreamController<Barcode?>();
     controller.onListen = () async {
-      _reader.decodeContinuously(
+      _reader?.decodeContinuously(
         video,
         allowInterop((result, error) {
           if (result != null) {
@@ -192,14 +246,14 @@ class ZXingBarcodeReader extends WebBarcodeReaderBase
       );
     };
     controller.onCancel = () {
-      _reader.stopContinuousDecode();
+      _reader?.stopContinuousDecode();
     };
     return controller.stream;
   }
 
   @override
   Future<void> stop() async {
-    _reader.reset();
+    _reader?.reset();
     super.stop();
   }
 }